Chemical Physics Letters, Vol.594, 30-33, 2014
Kinetic studies of the reaction NH2 + H2S
Amidogen (NH2) radicals were generated by pulsed laser photolysis of ammonia precursor at 193 nm, and monitored by laser-induced fluorescence excited at 570.3 nm. Experiments were conducted in argon bath gas with traces of hydrogen sulfide (H2S) at pressures of 9-25 mbar and temperatures of 294-820 K. The NH2 + H2S rate constant was found to be (4.30 +/- 0.25) x 10 (13) cm(3) molecule (1) s (1) independent of temperature. The rate constant for removal of vibrationally-excited NH2 (0, 1, 0) by H2S was estimated as (1.5 +/- 0.2) x 10 (11) cm(3) molecule (1) s (1), which includes both physical quenching and chemical reaction. (C) 2014 Elsevier B. V. All rights reserved.